Duke's Zion Williamson (1) drives to the basket against North Carolina during the first half of an NCAA college basketball game in the Atlantic Coast Conference tournament in Charlotte, N.C., Friday, March 15, 2019. (AP Photo/Chuck Burton)

Members of the Bolivarian National Guard loyal to Venezuelan President Nicolas Maduro run under a cloud of tear gas after being repelled with rifle fire by guards supporting Venezuelan opposition leader Juan Guaido in Caracas, April 30, 2019.